2006 Fiscal Year Final Research Report Summary
Improvement of Prediction Accuracy of Flood Inundation based on Quantification of Flood Mitigation Function of flat low-lying agricultural areas
| Project/Area Number |
16380163
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | KYUSHU UNIVERCITY |
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Principal Investigator |
MORI Ken Kyushu University, Faculty of Agriculture, Professor, 大学院農学研究院, 教授 (50117272)
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| Co-Investigator(Kenkyū-buntansha) |
HIRAMATSU Kazuaki Kyushu University, Faculty of Agriculture, Professor, 大学院農学研究院, 教授 (10199094)
MORI Makito Kyushu University, Faculty of Agriculture, Assistant Professor, 大学院農学研究院, 助手 (60325496)
KUROSAWA Kiyoshi Kyushu University, Institute of Tropical Agriculture, Assistant Professor, 熱帯農学研究センター, 助教授 (70128114)
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| Project Period (FY) |
2004 – 2006
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| Keywords | Flat low-lying agricultural area / Flood mitigation function / Drainage facility / Optimal control / Area along the lower reach of the Chikugo River / Red River Delta / Continuous tank model / GPS-derived precipitable water vapor |
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| Research Abstract |
In flat low-lying agricultural areas in Japan, pervading well-drained paddy field and rapidly-progressive urbanization lead to the public requirements of more accurate prediction of flood runoff and more appropriate control of drainage facilities. In developing countries in monsoon Asia region, drainage facilities in flat low-lying agricultural areas are generally not well equipped and more effective utilization of the poor drainage facilities is required to prevent flood damages. In this project, the flood mitigation function of flat low-lying agricultural areas was quantified and the prediction methods of flood inundation and the optimal control methods of drainage facilities were developed by positively taking into account the flood mitigation function of flat low-lying agricultural areas.
Rainfall intensity, water levels in a main drainage canal and a GPS-derived precipitable water vapor have been intensively and continuously observed in Chiyoda drainage basin along the lower reach
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of the Chikugo River, Japan. Additionally in Phu Lam Commune area in the Red River Delta, Northen Vietnam, the collection of hydrological data, exploratory and hearing investigations about basin topography and flood inundation were executed in on-the-spot examination. Based on the obtained data, the mathematical models for flood inundation analysis were constructed in Chiyoda drainage basin and Phu Lam Commune area, and the model structure and the optimal control of drainage facilities were investigated by numerical simulations using the mathematical models.
The results in Chiyoda basin indicated that the inundation time and the inundation area could be substantially reduced by introducing the optimal control of check gates in a main drainage canal and that the GPS-derived precipitable water vapor could be used as a predictive index of heavy rainfall. The results in Phu Lam Commune area showed that inundation in the paddy tanks at the end area from pumping stations may be due to the low flowing capacity of drainage facilities between canals and paddy fields resulting from inadequate maintenance of drainage facilities.
Additionally, the water quality conservation function and the functional aspect of creeks were investigated in this project. Less
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Research Products
(36 results)
